12.9Class hexagon socket head cap screw

Supported specifications: M1.4 or higher

Manufacturer: ANSCO, NF, NSN, GOSHO, KKT, TKS, N, etc.

The hexagonal hole has a strict dimensional tolerance,and some manufacturers make t larger than the standard value to make it less slippery.

Material: Structural alloy steel

Hardness: 39-44HRC

Surface treatment: blackening treatment (other surface treatments are available on demand)

Please ask our customer service for  specifications not shown in the following table .